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30-01-2019
Mathematics

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wegnerkolmp2741o wegnerkolmp2741o

30-01-2019

Answer:

= 30mn^4

Step-by-step explanation:

The area of a trapezoid

A = 1/2 (a+b) *h

where a and b are the top and bottom

A = 1/2( 3mn^2+ 9mn^2) * 5n^2

Combine like terms

A = 1/2(12mn^2) * 5n^2

=6mn^2 * 5n^2

= 30mn^4

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